Immersion Heater 4.75in

The Immersion Heater 4.75in by ALLSTAR PERFORMANCE is an engine oil heater designed for serious mechanics and engine builders who need reliable pre-start warming in cold climates or during extended storage periods. This 400-watt internal element heater maintains optimal oil viscosity before engine startup, reducing cold-start wear and extending engine life. Built as a screw-in unit with a 1/2 in NPT steel fitting, it integrates seamlessly into existing oil pan or block mounting points without requiring major modifications.

The immersion heater operates on standard 120V household current with a 3-foot power cord, making it practical for garage use or mobile shop environments. The 400-watt heating element delivers consistent, controlled warmth directly into the oil, preventing the thick, sluggish flow that cold oil creates in winter months or after long downtime. The steel construction and NPT-threaded fitting ensure durability and corrosion resistance, while the compact 4.75-inch length fits tight engine compartments without obstruction. This direct-immersion design is far more efficient than external oil cooler bypass heaters, as it heats the oil where it matters most—at the source.

Professionals and enthusiasts restoring vintage engines, preparing race vehicles for cold-weather events, or maintaining equipment in northern climates benefit most from this heater. It's ideal for diesel engines, air-cooled engines, or any application where oil temperature control is critical to starting reliability. Installation requires only a 1/2 in NPT threaded hole in the oil pan or engine block—standard on most automotive and small-engine applications. The kit includes everything needed for a straightforward setup, making it an excellent choice for shops looking to reduce warranty claims and customer startup issues during winter months.